seminar code
08-08-2014, 02:50 PM
A SEMINAR TOPIC ON 4G TECHNOLOGY
[attachment=66756]
INTRODUCTION
4G is the fourth generation of mobile phone mobile communication technology standards.
It is a successor to the third generation (3G) standards.
A 4G system provides mobile “ Ultra Broadband speed” – to be counted in gigabytes per second.
This technology is currently available in some countries but it is still being perfected.
WHAT IS 4G ?
In March 2008, the International Telecommunications Union-Radio communications sector (ITU-R) specified a set of requirements for 4G standards, named the IMT-Advanced.
Set peak speed requirements for 4G service at 100 Mbit/s for high mobility communication and 1 Gbit/s for low mobility communication.
The peak bit rate is further improved by smart antenna arrays for multiple-input multiple-output (MIMO) communications.
A 4G system does not support traditional circuit switched telephony service, but all-Internet Protocol (IP) based communication such as IP telephony.
EVOLUTION OF 4G
In April 2006, KT started the world's first commercial mobile WiMAX service in Seoul, South Korea.
In February 2007, the Japanese company NTT DoCoMo tested a 4G communication system prototype with 4×4 MIMO at 100 Mbit/s while moving, and 1 Gbit/s while stationary.
In Dec 2009, The first commercial LTE deployment was by TeliaSonera & NetCom. The modem devices on offer were manufactured by Samsung, and the network infrastructure created by Huawei & Ericsson.
On 10 April 2012, Bharti Airtel launched 4G LTE in Kolkata, first in India.
SYSTEM KEY COMPONENTS OF 4G
Long Term Evolution (LTE) is a radio platform technology that will allow operators to achieve even higher peak throughputs than HSPA+ in higher spectrum bandwidth.
LTE uses Orthogonal Frequency Division Multiple Access (OFDMA) on the downlink, which is well suited to achieve high peak data rates in high spectrum bandwidth.
SYSTEM KEY COMPONENTS OF 4G
WiMAX stands for Worldwide Interoperability for Microwave Access. WiMAX 2 also called Wireless MAN-Advanced has become the first true 4G technology to be approved by the IEEE and ITU.
This technology supports MIMO, femto cells, self-organizing networks & relays, and multicarrier operation. It supports both 120Mbps downlink and 60Mbps uplink speeds
The unique and excellent infrastructure of WiMAX is offering Ultra-Wideband and providing range from 2 to 10 GHz and outstanding time response.
SYSTEM KEY COMPONENTS OF 4G
Orthogonal frequency-division multiplexing (OFDM) is a frequency division multiplexing (FDM) scheme that uses a digital multi-carrier modulation method.
OFDM uses the spectrum more efficiently by making all the sub-carriers orthogonal to one another, using fast Fourier transform (FFT) to prevent interference between the closely spaced sub-carriers.
In OFDM, the guard band is reduced by the orthogonal packing of the subcarriers, improving the spectral efficiency .
SYSTEM KEY COMPONENTS OF 4G
Smart antennas (MIMO) are antenna arrays with smart signal processing algorithms used to identify spatial signal signature such as the direction of arrival (DOA) of the signal, and use it to calculate beam forming vectors, to track and locate the antenna beam on the mobile/target.
[attachment=66756]
INTRODUCTION
4G is the fourth generation of mobile phone mobile communication technology standards.
It is a successor to the third generation (3G) standards.
A 4G system provides mobile “ Ultra Broadband speed” – to be counted in gigabytes per second.
This technology is currently available in some countries but it is still being perfected.
WHAT IS 4G ?
In March 2008, the International Telecommunications Union-Radio communications sector (ITU-R) specified a set of requirements for 4G standards, named the IMT-Advanced.
Set peak speed requirements for 4G service at 100 Mbit/s for high mobility communication and 1 Gbit/s for low mobility communication.
The peak bit rate is further improved by smart antenna arrays for multiple-input multiple-output (MIMO) communications.
A 4G system does not support traditional circuit switched telephony service, but all-Internet Protocol (IP) based communication such as IP telephony.
EVOLUTION OF 4G
In April 2006, KT started the world's first commercial mobile WiMAX service in Seoul, South Korea.
In February 2007, the Japanese company NTT DoCoMo tested a 4G communication system prototype with 4×4 MIMO at 100 Mbit/s while moving, and 1 Gbit/s while stationary.
In Dec 2009, The first commercial LTE deployment was by TeliaSonera & NetCom. The modem devices on offer were manufactured by Samsung, and the network infrastructure created by Huawei & Ericsson.
On 10 April 2012, Bharti Airtel launched 4G LTE in Kolkata, first in India.
SYSTEM KEY COMPONENTS OF 4G
Long Term Evolution (LTE) is a radio platform technology that will allow operators to achieve even higher peak throughputs than HSPA+ in higher spectrum bandwidth.
LTE uses Orthogonal Frequency Division Multiple Access (OFDMA) on the downlink, which is well suited to achieve high peak data rates in high spectrum bandwidth.
SYSTEM KEY COMPONENTS OF 4G
WiMAX stands for Worldwide Interoperability for Microwave Access. WiMAX 2 also called Wireless MAN-Advanced has become the first true 4G technology to be approved by the IEEE and ITU.
This technology supports MIMO, femto cells, self-organizing networks & relays, and multicarrier operation. It supports both 120Mbps downlink and 60Mbps uplink speeds
The unique and excellent infrastructure of WiMAX is offering Ultra-Wideband and providing range from 2 to 10 GHz and outstanding time response.
SYSTEM KEY COMPONENTS OF 4G
Orthogonal frequency-division multiplexing (OFDM) is a frequency division multiplexing (FDM) scheme that uses a digital multi-carrier modulation method.
OFDM uses the spectrum more efficiently by making all the sub-carriers orthogonal to one another, using fast Fourier transform (FFT) to prevent interference between the closely spaced sub-carriers.
In OFDM, the guard band is reduced by the orthogonal packing of the subcarriers, improving the spectral efficiency .
SYSTEM KEY COMPONENTS OF 4G
Smart antennas (MIMO) are antenna arrays with smart signal processing algorithms used to identify spatial signal signature such as the direction of arrival (DOA) of the signal, and use it to calculate beam forming vectors, to track and locate the antenna beam on the mobile/target.